新增示例（多图上传）

ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserServiceImpl.java

@@ -265,6 +265,7 @@ public class SysUserServiceImpl implements ISysUserService
      * @param roleIds 角色组
      */
     @Override
+    @Transactional
     public void insertUserAuth(Long userId, Long[] roleIds)
     {
         userRoleMapper.deleteUserRoleByUserId(userId);